mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-16 07:24:39 +08:00
4da722ca19
Pretty much any node can have a status property, so it doesn't need to be in examples. Converted with the following command and removed examples with SoC and board specific splits: git grep -l -E 'status.*=.*' Documentation/devicetree/ | xargs sed -i -E '/\sstatus.*=.*"(disabled|ok|okay)/d' Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Rob Herring <robh@kernel.org>
57 lines
2.1 KiB
Plaintext
57 lines
2.1 KiB
Plaintext
Generic Serial DT Bindings
|
|
|
|
This document lists a set of generic properties for describing UARTs in a
|
|
device tree. Whether these properties apply to a particular device depends on
|
|
the DT bindings for the actual device.
|
|
|
|
Optional properties:
|
|
- cts-gpios: Must contain a GPIO specifier, referring to the GPIO pin to be
|
|
used as the UART's CTS line.
|
|
- dcd-gpios: Must contain a GPIO specifier, referring to the GPIO pin to be
|
|
used as the UART's DCD line.
|
|
- dsr-gpios: Must contain a GPIO specifier, referring to the GPIO pin to be
|
|
used as the UART's DSR line.
|
|
- dtr-gpios: Must contain a GPIO specifier, referring to the GPIO pin to be
|
|
used as the UART's DTR line.
|
|
- rng-gpios: Must contain a GPIO specifier, referring to the GPIO pin to be
|
|
used as the UART's RNG line.
|
|
- rts-gpios: Must contain a GPIO specifier, referring to the GPIO pin to be
|
|
used as the UART's RTS line.
|
|
|
|
- uart-has-rtscts: The presence of this property indicates that the
|
|
UART has dedicated lines for RTS/CTS hardware flow control, and that
|
|
they are available for use (wired and enabled by pinmux configuration).
|
|
This depends on both the UART hardware and the board wiring.
|
|
Note that this property is mutually-exclusive with "cts-gpios" and
|
|
"rts-gpios" above, unless support is provided to switch between modes
|
|
dynamically.
|
|
|
|
|
|
Examples:
|
|
|
|
uart1: serial@48022000 {
|
|
compatible = "ti,am3352-uart", "ti,omap3-uart";
|
|
ti,hwmods = "uart2";
|
|
clock-frequency = <48000000>;
|
|
reg = <0x48022000 0x2000>;
|
|
interrupts = <73>;
|
|
dmas = <&edma 28 0>, <&edma 29 0>;
|
|
dma-names = "tx", "rx";
|
|
dtr-gpios = <&gpio2 22 GPIO_ACTIVE_LOW>;
|
|
dsr-gpios = <&gpio2 23 GPIO_ACTIVE_LOW>;
|
|
dcd-gpios = <&gpio2 24 GPIO_ACTIVE_LOW>;
|
|
rng-gpios = <&gpio2 25 GPIO_ACTIVE_LOW>;
|
|
cts-gpios = <&gpio0 12 GPIO_ACTIVE_LOW>;
|
|
rts-gpios = <&gpio0 13 GPIO_ACTIVE_LOW>;
|
|
};
|
|
|
|
scifa4: serial@e6c80000 {
|
|
compatible = "renesas,scifa-sh73a0", "renesas,scifa";
|
|
reg = <0xe6c80000 0x100>;
|
|
interrupts = <GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>;
|
|
clocks = <&mstp2_clks SH73A0_CLK_SCIFA4>;
|
|
clock-names = "fck";
|
|
power-domains = <&pd_a3sp>;
|
|
uart-has-rtscts;
|
|
};
|